A method for detecting a decoy source of a satellite radionavigation signal, the method being executed by a satellite radionavigation signal reception device comprising two receivers, the method comprising the steps of: for each signal received by the reception device and transmitted by a different satellite, estimating the phase of the signal received by each receiver, computing the estimated phase difference for each receiver, comparing the phase differences computed for multiple different satellites and, if at least two phase differences computed for two different satellites are substantially identical, concluding that a decoy source is present.
Legal claims defining the scope of protection, as filed with the USPTO.
2. The method for detecting a decoy source as claimed in claim 1, wherein each receiver comprises a correlator for correlating the received signal with a local code associated with a satellite and the phase of the signal received by each receiver is estimated at the correlator output.
5. The method for detecting a decoy source as claimed in claim 1, wherein the signal reception position is computed based on the pseudoranges computed by the receiver for all satellites.
6. The method for detecting a decoy source as claimed in claim 1, wherein the position of the satellite when the signal is transmitted is determined based on a received time measurement associated with the computed pseudorange and on ephemerides.
7. A satellite radionavigation signal reception device comprising two distinct receivers (RX1, RX2) each capable of receiving satellite radionavigation signals and a computing unit (DL) configured to execute the steps of the method for detecting a decoy source of a satellite radionavigation signal as claimed in claim 1.
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February 9, 2021
December 3, 2024
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